Form the triangle using gridlines. The measure of segment JK is the hypotenuse

of the right triangle.

From Figure: .

The Pythagorean Theorem states that the square of the hypotenuse is the sum of

the squares of the legs.

                       (Substitute )

                      (Evaluate powers: )

                              (Add: 25 + 64 = 89)

                        (Take the Square of root each side: )

Distance between two points J and K is about 9.433 units.